II/66ivo://CDS.VizieR/II/66CDSDucati J.R.1998-06-19T07:42:06Z1998-06-19T07:39:50ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvisible-astronomyh-alpha-photometryline-intensitiesThis catalogue contains 4095 published observations of the quantitative observations of H{alpha} for 2700 stars. These observations were collected from values published between 1949 and 1980. The H{alpha} index was reduced to a common system described by Strauss & Ducati (1981A&AS...44..337S); the values of the original index can be retrieved with a linear transformation (cc = correlation coefficient): ----------------------------------------------------------------- References a b cc lower upper Spectral range ----------------------------------------------------------------- 2 1.401 -1.604 0.972 1.050 1.170 10 1.33 -2.4 0.000 13 1.526 0.130 0.992 2.910 3.300 14,36 0.343 0.814 0.949 1.400 O B A0 14,36 0.269 0.969 0.972 1.470 A1 F G K M 20,21,22,23,37 0.39 -0.55 1.200 24,25 1.35 -1.48 0.922 1.020 1.170 -----------------------------------------------------------------1981A&AS...45..119Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/II/66CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/66https://vizier.cds.unistra.fr/viz-bin/votable?-source=II/66https://vizier.iucaa.in/viz-bin/votable?-source=II/66http://vizieridia.saao.ac.za/viz-bin/votable?-source=II/66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultII/66/obsPublished measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHD? Star identification, usually HDmeta.idintnullablem_HDHD suffix (/3,/0, A, B, etc.)meta.code.multipcharIDAlternate designationmeta.idcharSpSpectral type from original referencesrc.spTypecharVmag? Visual magnitude if providedmagphot.mag;em.opt.VfloatnullableHa? H alpha measurementmagspect.indexdoublenullableu_HaUncertainty code for H alphameta.code.errorchare_Ha? Mean error of H alpha measurementmagstat.errorfloatnullablex_Ha* Method of measurement of Hameta.unitcharo_Ha? Number of observations or weightmeta.numberfloatnullablew_wt? Weight of weightstat.weightintnullablerem*[1,6]? Coded remarksmeta.noteintnullableref[1/37] Reference number (file refs.dat)meta.refintII/66/meansHomogeneous datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDHD number or other namemeta.id;meta.maincharHaH-alpha index on common system (see Strauss & Ducati, 1981A&AS...44..337S)magspect.indexfloatref[1/37] References to original datameta.refintII/66/refsReferences in numerical orderref[1,37]+= Reference numbermeta.refintprimaryCont[ab ] Continuationmeta.notecharsourceText of referencemeta.refcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint